Comparison of Bacterial and Yeast Ethanol Fermentation Yield from Rice Straw

Abstract:

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This study was to investigate the fermentation of rice straw using various microorganisms, i.e., the bacterium Zymomonas mobilis, a distillery yeast Saccharomyces cerevisiae and a co-culture of Zymomonas mobilis and Saccharomyces cerevisiae. Rice straw was pretreated with alkaline and followed by enzymatic hydrolysis using cellulase before fermentation by the bacterium and a distillery yeast. Results show that alkali pretreatment is appropriate for rice straw since this pretreatment condition can produce the maximum cellulose of 88.96% and reducing sugar content of 9.18 g/l. Furthermore, the ethanol yield after enzymatic hydrolysis (expressed as % theoretical yield) was 15.94-19.73% for the bacterium, 20.48-35.70% for yeast and 21.56-29.89% for co-culture. Therefore, the distillery yeast was a suitable microorganism for ethanol production from rice straw.

Info:

Periodical:

Advanced Materials Research (Volumes 347-353)

Edited by:

Weiguo Pan, Jianxing Ren and Yongguang Li

Pages:

2541-2544

DOI:

10.4028/www.scientific.net/AMR.347-353.2541

Citation:

B. Laobussararak et al., "Comparison of Bacterial and Yeast Ethanol Fermentation Yield from Rice Straw", Advanced Materials Research, Vols. 347-353, pp. 2541-2544, 2012

Online since:

October 2011

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Price:

$35.00

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